One's achievement in not missing a trick? (5,4)
I believe the answer is:
grand slam
'not missing a trick?' is the definition.
I can't judge whether this definition defines the answer.
'one's achievement' is the wordplay.
'one's' becomes 'grands' (I can't justify this - if you can you should believe this answer much more).
'achievement' becomes 'lam' (lam is a kind of achievement).
'grands'+'lam'='GRAND SLAM'
'in' is the link.
Can you help me to learn more?
(Other definitions for grand slam that I've seen before include "Top bid in bridge" , "Feat of winning all the tricks in a hand of bridge" , "It's extremely tricky" , "Winning of all tricks (or major tournaments)" , "Success at table" .)